Emulsion type sizing agent for carbon fibers, process for its pr

Details Emulsion type sizing agent for carbon fibers, process for its pr Emulsion type sizing agent for carbon fibers, process for its pr

1982-09-07

1983-12-13

Page, Thurman K.

Coating processes

With post-treatment of coating or coating material

Heating or drying

252 52A, 427379, 4273855, 523205, 523403, 523406, 523414, 523424, 523454, 523456, B05D 302

Patent

active

044205120

ABSTRACT:
An aqueous emulsion type sizing agent for carbon fibers is disclosed. The sizing agent contains a compound represented by the following general formula (I): ##STR1## wherein A represents (C.sub.2 H.sub.4 O).sub.l or (C.sub.2 H.sub.4 O).sub.n (C.sub.3 H.sub.6 O).sub.m [l is 18 to 70; n is 18 to 70; and m is 2 to 50 (1.ltoreq.n/m.ltoreq.35)];
a compound represented by the following general formula (II): ##STR2## wherein R represents C.sub.q H.sub.2q+1 or ##STR3## (q is 10 to 18; and p is 15 to 70); and an epoxy resin, a process for preparation of the agent, and the method for using it are also disclosed. The sizing agent has excellent emulsion stability and heat stability, and it can impart excellent bundling properties to carbon fibers.

REFERENCES:
patent: 2872427 (1959-02-01), Schroeder
patent: 3945964 (1976-03-01), Hastings et al.
patent: 4073762 (1978-02-01), Hosoda et al.
patent: 4219457 (1980-08-01), Taniguchi et al.
patent: 4360608 (1982-11-01), Hijikata et al.

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